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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10297375 B1

PDFFull Text
Date of Patent:
May. 21, 2019

Filed:

Nov. 06, 2013

Grain-oriented electrical steel sheet and method of manufacturing grain-oriented electrical steel sheet

Applicant:

Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;

Inventors:

Koji Hirano, Kisarazu, JP;

Yoshio Nakamura, Kitakyushu, JP;

Shohji Nagano, Kitakyushu, JP;

Seiichiro Cho, Kitakyushu, JP;

Assignee:

NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Veronica F Faison

Int. Cl.
CPC ...
H01F 1/16 (2006.01); H01F 1/147 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); B22D 11/00 (2006.01); C21D 8/12 (2006.01); C21D 10/00 (2006.01); C23C 26/00 (2006.01);
U.S. Cl.
CPC ...
H01F 1/14783 (2013.01); B22D 11/001 (2013.01); C21D 8/1205 (2013.01); C21D 8/1222 (2013.01); C21D 8/1233 (2013.01); C21D 8/1255 (2013.01); C21D 8/1261 (2013.01); C21D 8/1272 (2013.01); C21D 8/1277 (2013.01); C21D 8/1283 (2013.01); C21D 8/1294 (2013.01); C21D 9/46 (2013.01); C21D 10/005 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C23C 26/00 (2013.01); H01F 1/16 (2013.01);
Abstract

A method of manufacturing a grain-oriented electrical steel sheet, includes: a laser processing process of forming a laser processed portion by irradiating a region on one end side of a steel sheet in a width direction after being subjected to a cold rolling process with a laser beam along a rolling direction of the steel sheet; and a finish annealing process of coiling the steel sheet with the laser processed portion formed thereon in a coil shape and performing a finish annealing on the coil-shaped steel sheet. In the laser processing process, a melted-resolidified portion having a depth of greater than% and equal to or less than% of a sheet thickness of the steel sheet is formed by the irradiation of the laser beam at a position corresponding to the laser processed portion.

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